Method for producing bearing ferrule blanks

Abstract

The bearing ring blank production method includes the following procedures: smelting molten steel, centrifugal casting pipe, stress annealing, blanking ring to be rolled, stripping inner diameter and outer diameter of ring, checking quality of intermediate blank, medium frequency heating, hot-rolling ring and forming, spheroidal annealing, ball-blasting, checking ring quality, soaking the finished ring blank in oil and putting in storage.

Description

Technical field [0001] The present invention discloses a method for producing a bearing ring blank, which belongs to the technical field of bearing production. Background technique [0002] The materials used in the production of bearing rings in the bearing industry are mainly bearing seamless steel pipes (except for large and special bearings). For a long time, bearing seamless steel pipes have been produced by large and medium-sized metallurgical enterprises. Due to the current production technology and The process is relatively complicated, the use of high-energy-consuming heavy-duty production equipment, many production processes, and the consumption of various auxiliary materials are also high, so the production cost of bearing seamless steel pipes is high. Generally speaking, the cost of a set of finished bearings, the proportion of bearing inner and outer rings is 40%-60%. [0003] At present, there are many production methods for bearing seamless st...

AI Technical Summary

Problems solved by technology

[0006] 1. The production process is complicated, there are many production processes, many production auxiliary materials are used, and the waste rate is high;

[0007] 2. The use of mechanical equipment is large and the investment is large;

[0008] 3. It cannot meet the user's small batch and special chemical composition requirements;

[0009] 4. The steel pipe is provided to the user, and the bearing manufacturer still needs to cut the material, which increases the production cost of the ferrule;

[0010] 5. High production cost

[0012] 1. This process can only produce large and super-large special bearing rings, but cannot produce small and medium-sized bearing rings that account for more than 80% of the total bearings;

[0013] 2. The production efficiency of this process is low, generally only about 1-3 bearing ring blanks are centrifugally cast each time;

[0014] 3. The process requires the use of free forging technology, which is backward, manual operation, long processing time for a single piece, poor quality control, and high scrap rate;

[0015] 4. Due to the free forging process used in this process, the flaw detection inspection of the intermediate blank is required, which increases the processing cost and time;

[0016] 5. The processing allowance of this process is 1-2.5 times, and the waste of metal materials is serious;

[0017] 6. The process environment is noisy (mainly caused by free forging)

[0018] 7. The production efficiency of this process is low, the material utilization rate is low, and the production cost is high